<template>
    <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import * as echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'

const animationDuration = 6000

export default {
    mixins: [resize],
    props: {
        className: {
            type: String,
            default: 'chart'
        },
        width: {
            type: String,
            default: '100%'
        },
        height: {
            type: String,
            default: '300px'
        },
        chartData: {
            type: Array,
            default: []
        },
    },
    data () {
        return {
            chart: null
        }
    },
    watch: {
        chartData: {
            deep: true,
            handler (val) {
                this.setOptions(val)
            }
        }
    },
    mounted () {
        this.$nextTick(() => {
            this.initChart()
        })
    },
    beforeDestroy () {
        if (!this.chart) {
            return
        }
        this.chart.dispose()
        this.chart = null
    },
    methods: {
        initChart () {
            this.chart = echarts.init(this.$el, 'macarons')
            this.setOptions(this.chartData)
        },
        setOptions (chartData) {
            let series = chartData.map((item, i) => {
                let obj = {
                    name: 'pageA' + i,
                    type: 'bar',
                    data: item,
                    animationDuration
                }
                return obj
            })
            console.log(series)
            this.chart.setOption({
                // legend: {
                //     data: ['Forest', 'Steppe', 'Desert', 'Wetland']
                // },
                tooltip: {
                    trigger: 'axis',
                    axisPointer: { // 坐标轴指示器，坐标轴触发有效
                        type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
                    }
                },
                grid: {
                    top: 10,
                    left: '2%',
                    right: '2%',
                    bottom: '3%',
                    containLabel: true
                },
                xAxis: [{
                    type: 'category',
                    data: ['一班', '二班', '三班', '四班', '五班'],
                    axisTick: {
                        alignWithLabel: true
                    }
                }],
                yAxis: [{
                    type: 'value',
                    axisTick: {
                        show: false
                    }
                }],
                series
            })
        }
    }
}
</script>
